فهرس المقالات Mass spectra حرية الوصول المقاله صفحة الملخص نص كامل 1 - Synthesis and spectral characterization of naphthyldihydrazones derived from some 1,3- dicarbonyl compounds and their Ni(II), Cu(II) and Zn(II) complexes Muhammed Ummathur Anjali Krishnan Perumpalli Ummer